Select any two GPUs for comparison
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Gaming Performance Comparison

Recommended System Requirements
Game Radeon HD 6645G2 GeForce 320M
Cyberpunk 2077 2193% 3167%
Red Dead Redemption 2 1569% 2278%
Dragon Ball Z Kakarot 930% 1367%
Halo: Reach 430% 656%
Microsoft Flight Simulator 2193% 3167%
Call of Duty: Modern Warfare 1569% 2278%
FIFA 20 789% 1167%
Doom Eternal 1335% 1944%
Grand Theft Auto VI 2451% 3533%
Need For Speed Heat 1569% 2278%

In terms of overall gaming performance, the graphical capabilities of the AMD Radeon HD 6645G2 are significantly better than the Nvidia GeForce 320M.

The Radeon HD 6645G2 has no core clock speed set, so any comparison between Texture and Pixel Fill Rates is not currently possible.

The Radeon HD 6645G2 was released over a year more recently than the GeForce 320M, and so the Radeon HD 6645G2 is likely to have better driver support, meaning it will be more optimized for running the latest games when compared to the GeForce 320M.

The Radeon HD 6645G2 and the GeForce 320M have the same amount of video memory, but are likely to provide slightly different experiences when displaying game textures at high resolutions.

The memory bandwidth of the Radeon HD 6645G2 and the GeForce 320M are the same, which means the Radeon HD 6645G2 and the GeForce 320M have equal limitations when it comes to graphical data transfer.

The Radeon HD 6645G2 has 560 Shader Processing Units and the GeForce 320M has 48. However, the actual shader performance of the Radeon HD 6645G2 is 0 and the actual shader performance of the GeForce 320M is 45. The GeForce 320M having 45 better shader performance and an altogether better performance when taking into account other relevant data means that the GeForce 320M delivers a marginally smoother and more efficient experience when processing graphical data than the Radeon HD 6645G2.

The GeForce 320M requires 23 Watts to run but there is no entry for the Radeon HD 6645G2.

Game FPS Benchmarks On Ultra

GPU Architecture

Core Speed-vs450 MHz
Boost Clock-vs-
ArchitectureTerrascale 2Tesla MCP89
OC Potential - vs Poor
Driver Support - vs Poor
Release Date14 Jun 2011vs01 Apr 2010
GPU LinkGD LinkGD Link
Approved
Comparison

Resolution Performance

1366x768 - green tick vs green tick -
1600x900 - vs green tick
2.4
1920x1080 - vs green tick
1.7
2560x1440 - green tick vs green tick -
3840x2160 - vs green tick
0.1

GPU Memory

Memory-vsN/A
Memory Speed667 MHzvs667 MHz
Memory Bus128 Bitvs128 Bit
Memory TypeDDR3vsDDR3
Memory Bandwidth21.3GB/secvs21.3GB/sec
L2 Cache - vs green tick 0 KB
Delta Color Compression no vs no
Memory Performance 0% green tick vs green tick 0%
Comparison

GPU Display

Shader Processing Units560vs48
Actual Shader Performance-vs2%
Technology-vs40nm
Texture Mapping Units-vs16
Texture Rate-vs7.2 GTexel/s
Render Output Units-vs8
Pixel Rate-vs3.6 GPixel/s
Comparison

GPU Outputs

Max Digital Resolution (WxH)2560x1600vs2560x1600
VGA Connections0vs0
DVI Connections0vs0
HDMI Connections0vs0
DisplayPort Connections-vs-
Comparison

GPU Power Requirements

Max Power-23 Watts
Recommended PSU--

GPU Features

DirectX11vs10.0
Shader Model5.0vs4.1
Open GL4.1vs3.3
Open CL-vs-
Notebook GPUyesyes
SLI/Crossfirenovsno
Dedicatedyesvsno
Comparison

GPU Supporting Hardware

Recommended Processor-Intel Core i3-M330 2.13GHz
Recommended RAM-2 GB
Maximum Recommended Gaming Resolution-1024x768

Gaming Performance Value

Performance Value

GPU Mini Review

Mini ReviewRadeon HD 6645G2 is a combination of an entry/middle class level AMD Radeon HD 6490M and an integrated AMD Radeon HD 6620G (APU). This system is known as AMD Dual Graphics and also asymmetric CrossFire. It uses Alternate Frame Rendering (AFR) to render different frames on the two graphic cores and can suffer from micro-Stuttering.
The performance relies on solid driver support and, at times, it might even be worse the performance of the Radeon HD 6490M by itself. Only DX10 & DX11 modes are supported which means a game set with lower settings and not set to use DX10/DX11 is not accelerated (does not make use of the asymmetric crossfire feature within the card).
Due to the micro stuttering and performance problems, Dual Graphics may sometimes cause more problems than the possible dual card performance gains they suggest.
Overview
GeForce 320M is an Integrated Mobile Graphics Card based on the Second Revision of the Tesla Architecture.

Architecture
Tesla was NVIDIA's First Unified Shader Architecture.

GPU
It equips a GPU Codenamed Tesla MCP89 which has 4 Stream Multiprocessors activated and thus offers 48 Shader Processing Units, 16 TMUs and 8 ROPs. The Central Unit is clocked at 450MHz.

Memory
The GPU also Shares the System's RAM which varies from laptop to laptop. Typically, the GPU reserves 256MB. Depending on whether or not the system's RAM is Dual-Channeled, it can access either a 64-bit or 128-bit memory interface. The operating memory clock also depends on the at which speed the System's RAM is running and is limited by the highest operating speed that the Processor supports. It is then obvious the Memory Bandwidth depends on a lot of factors and thus this Graphics Card performance may vary heavily from system to system.

Features
DirectX 10.1 Support (10.0 Hardware Default) and support for NVIDIA PureVideo HD Technology, Dual-stream Hardware Acceleration, PhysX, CUDA, HybridPower and other technologies.

Power Consumption
With a rated board TDP of 14W, it may be used on very small notebooks.

Performance
Gaming benchmarks put its performance considerably above the desktop GeForce 210.
Recommended CPU
-
Possible GPU Upgrades
N/A
N/A
GPU Variants
-
-

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